Tuner Sony ST-SA5ES negru, stare excelenta, la cutie. Poze reale!

Sony ST-SA5ES cap de serie

Functioneaza perfect.

Optic excelent.

Se vinde impreuna cu antenele originale FM si AM, in ambalajul original.

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Sony ST-SA5ES

specifications

FM band (87-108 MHz)
AM/MW band (531-1602 kHz)
LW band (153-279 kHz)
tuning system: Quartz synthesizer
automatic tuning: yes
presets: 30
signal strength indicator: dB
strength indicator segments: 10
muting: yes
extra antenna input: yes
antenne connector (FM): COAX
sensitivity (stereo, S/N=46 dB) 38.5 dBf
distortion (stereo): 0.008 %
signal/noise ratio (stereo): 95 dB
display: FL
remote sensor: yes
RDS EON: yes
power consumption: 15 W
dimensions: width 430 mm
height 98 mm
depth 340 mm
weigth: 6.3 Kg
Made in France

Review:

''I recently had the opportunity to try a Sony ST-SA5ES digital FM tuner. My reason for borrowing the tuner was so I could align the RF front end and IF circuits for optimum sensitivity and image rejection. Once aligned, the Sony ST-SA5ES tuner was found to have equal sensitivity and image rejection to my Onkyo T-9090 II FM tuner.

Technical

Two 75 ohm antenna inputs which can be switched via the front panel, go to the first RF amplifier - a Toshiba 2SK241 FET. The RF front end is tuned by six KV1320 varicap diodes. This arrangement is excellent for image and spurious rejection. The varicap diodes act as a automatic preselector which pass a narrow bandwidth (~ 2MHz) of signals to the first RF amplifier. For this reason the image rejection performance is 100dB.

The FM oscillator is built around a Toshiba 2SK161 FET. The FM mixer consists of a Toshiba 3SK122-K dual gate MOSFET.

Two IF stages are provided for wide and narrow IF bandwidth. Two 180 KHz Murata filters are used for wide if bandwidth. Two 180 KHz and two 150 KHz Murata filters are used for narrow if bandwidth. The IF amps used in the IF stages are Toshiba uPC1163HA ICs.

A quadrature detector precedes the audio frequency amplifier.

Subjective operation

I liked the feel of the main tuning control on the front panel. This is much preferable to push button electronic tuning.

The signal strength can be read from a 2 digit digital display. The threshold level for the digital display is around 1-1.5 uV (17dB). For strong signals, the display reads 70dB+.

The frequency digital display is small, hence difficult to read from a distance.

It is interesting to note that due to congested FM band conditions in Europe, most European FM DXers replace the ST-SA5ES's IF filters with Murata SFE 10.7 MHY-A 110 KHz filters.

The ST-SA5ES also has RDS (Radio Data System).

Conclusion

The Sony ST-SA5ES is an excellent tuner for FM-DX. There are only a handful of FM tuners which can either match or exceed its DX performance.

In Australia, good FM tuners for DX are very hard to find new or second hand. The Sony ST-SA5ES retails around $1,000 new and $500 second hand."

Specifications

Tuning range: 87.5 - 108 MHz (50 KHz steps)
Sensitivity - usable 10.3 dBf 0.9 uV (75 ohms), 1.8 uV (300 ohms)
Sensitivity at 50dB 38.5 dBf 23 uV (75 ohms), 46 uV (300 ohms)
Harmonic distortion Wide: 0.004% (mono)
0.0075% (stereo)
Narrow: 0.04% (mono)
0.07% (stereo)
Stereo separation Wide: 70 dB
Narrow: 50 dB
Selectivity Narrow: 65 dB (+/- 300 KHz)
Wide: 70 dB (+/- 400 KHz)
Image rejection ratio 100 dB